Apparatus for cleaning windows



H. VON LITTROW APPARATUS FOR CLEANING WINDOWS Nav. 1731925.

Filed may 24. 1924 -panes and window screens or glasses arsurface,'f. i. by rain, or if itis inoiston its surface singly Patented Nov, 17, i925.

'Hans VON mrrnow; or cHEMNiTz, GERMANY.

traten r rasee.

APPARATUS For. CLEANING wrnnows.

' appncaanmea may' 24.

To alla/710m it may concern:

Be it known that I, HANS voN` Lrr'raow, a citizen vof the :Republicl of Germany, and resident ofv Chenn'xitz,` in the Free State of Saxony, GermanI Republic, have invented a new and useful Apparatus for Cleaning lVindows, of which the following is a speciication.

The present an apparatus invention has for its object forrleaning by wipers the ranged on vehicles of any kind.

For the purpose. mentioned before various constructions. of cleaning-apparatus have been proposed. For example, said apparatus were so arranged that when use on the outer side ofthe rpane lthe inner side of the latter was cleaned also by a simultaneous movement ofl thewiper situated on the other pane-surface, although a cleaning of said surface'is perhaps not at4 all desired, or necessary, as can clearly be seen from the4 following explanations:

The rubber by wh'ch the wipers `are generally coated has, las is well'lpkn'own, an intense friction on the. pane whilst Ain a d'ry state. If the pane-is only moist on .its outer -inner side alone, f. i. by boiler-steam or human respiration, the 'wiper lfirmly adheres to the dry pane-surface and ,canonly be actuated or moved with great diiiiculty.

Now thepresent-finvention has forits vob,- ject to obviate and remove said disadvantage and to offer, according tothe more or less intense deposits on the pane-surfaces,` the possibility to actuate against rthe inner or against the outer surface alone or, if necessary, to simultaneously aetuate ,on both surfaces by'the wipers and to exert a pressure equal .on both sides and of 4any. desired intensity, said pressure allowing to also remove hard crusts, as for instance ice. V

For obtaining said purpose, one `of the wipers is fastened on a central axle and the other one to la sleeve embracing said axle.

A spring is inserted between a collar fastened to said axle and the one of the extremities vof the sleeve projecting into a socket by which the cleaning apparatus isfastened or held `lon the pane. Said spring presses the axle `and the sleeve away from each other in such a manner that the wipercarriers are situated at a distance away from both` pane-surfaces whereby the rubin an arc, whereas -cleaning apparatus formi dthe present -invention 1s represented in the apparatus spectively of Fig.

, mounting I) into position to engage vraza. serial ivoaiaeos..

ber or any suitable. garniture of the wipers is spared, For the purpose of cleaning one vor both pane-surfaces two members are provided for instance in the shape of two handles arranged in parallelism with one' another, one ofthem being fastened to the axle and the other to the sleeve. rBy seizinoa both handles by the hand, they can be D moved against each other 1n such a manner that both wiper-carriers collectively move- 1 of the wipers or both of them may be ypressed against the pane-surfaces.

An example of construction'of the pane ng the object of drawing annexed lto thedescription, saidv being, for instance, used forthe window of the locomotive vdriver stand.

Fig. l1 is a longitudinal section through the apparatus andi either one or the other a portion ofthe pane of transparent material adjacent thereto', Figs.

-2 and 3 represent vertical sections taken in the plane of the lines A-B and C-D rerepresent front views on `a smaller scale showing various positions of the centre of the wiper-device proper,

situated either in the pane itself, or "Within or'outside the-frame respectively.. ln Fig; 1 the pane of glass or other transtion to'operate on one'or both sides ofy the pane to remove any moisture, such as snow, 'ra1n,y `1ce or other matter deposited 1, and Figs. 4, 5 and 6 said centre vbeing parent material 'is denoted by a, andthe ap- ,parat-.us .1s arranged. to'bemoved 'into posithereon, fwhich might tend to obstruct the transparency of the pane. An opening for inserting and fastening the cleaning apparatus is arranged in the pane,l For this purpose a mountingb arranged with a flange and an outer thread iskinserted into the opening mentioned, which mounting rests with its iange against a yielding packing c fitted in the pane a.

A nut d issen'ewed on the thread of the y the yielding packing c and fasten the mounting on the pane. Y

, A check-nut e is also screwed on the mounting b yto lock the nut d against unin- .tent-ional displacement.

The axle f embraced by a collar is inserted into the bore of the sleeve b and carries the outer wiper-carrier g. A sleeve wiper-carriers firmly arranged on the axlev f, said wipercarrier being connected with the sleeve z' by'ascrew.

and n are two handles acting as thrusting'and pulling members. In the free extremity of the sleeve u a longitudinal slot k is arranged in whichthe handle m may hev moved along. Said handle is fastened'to the; extremity of the axle f by a peg o. The Second handle n is fastened to t-he free extremity of the sleeve z' by a peg p passed through a filling piece p1.

A screw or ring-spring g lis freely inserted into the sleeve b and wound around the axle f, at the same time resting with one of its extremities against the collar j arranged on said axle and with the otherl one against the front-face of the sleeve z' projecting into the bore of the sleeve b, said spring q acting against the axle f and the sleeve z' in such a manner, that the wiper carriers g, h, fastened on them are generally held at a distance from the surface of the panes.

A stop r is fastened to the front-surface of the' sleeve b and a stop s o the fronts surface of the counternut e, both-'stops lira/iting the movement or displacement of? the and k outwardly andiI so holding the spring g under tension.

The centre of the wiper-carriers g, It can be differently situated in respect of; the panes to be cleaned.

In the arrangement shown in Fig; 4i the centre of the carriers mentioned is situated within the pane itself (in accordance with the arrangement shown in Fig. l), in Fig. 5 the centre vof the carriers is placed within the pane-frame itself and in Fig. 6; outside the frame and within the front-wall of the locomotive-driver stand.

The mode of operation of the pane-cleaning apparatus described is as follows:

In case it is intended to clean the outer surface of the pane a, the handle m, is drawn or.attracted against the action of the spring gvby the hooked -fingers of the hand in such a manner that the Wiper arranged on the carrier g is pressed' on to the outer surface of the pane a. By a simultaneous turning movement of the attracted handle m the pane-surface is cleaned whereas the inner Wiper-carrier h. turns, without effect. If however, it is intended to clean the interior surface of the pane, the handle n is pushed, in contrary .to the action of the spring g, by theinner surface of the hand against said pane w-hereby the wiper of the carrier h tightly rests against said interior pane-surface,iwhich is cleaned by the turning movement.- of the handle n, Whereas the outer wiper-carrier g partakes of said movement Without ,any elfect.

If it is intended to simultaneously clean both pane-surfaces, bothhandles m7L are attracted against each other by clenching the hand and againsttthe effect.` ofthe spring q. Both handles are` hereafter turned and pressed With any desired pressure equal on both sides of the pane against said mountir'ig4 adapted to clean the outerand inner surfaces-:of a window pane, of a v central; axle cannying the outer wiper, a sleeve surrounding said axle and carrying the inner apena yielding lmeans interposed between the wiper-carriers for normally holding th wiperscarriers a distance from the window pane, a plurality of stops on said mounting for cooperating with said yielding means: for limiting the outward movement ofthe wiper-carriers, and means for separatelyr movlng the wiper-carriers into contact with the surfaces of the pane.

2. I'n a window cleaning apparatus for vehicles of' any kind, the combination with a mounting, wiper-carrierson said mounting adapted to be used separately for cleaning the outer and inner surfaces of a window pane, of a central axle carrying the outer wiper, a collar on one end of said axle, a sleeve extending through the mounting and surrounding said axle, said sleeve carrying .the inner wi er, a spring around said vaxle between saidp collar and sleeve, a plurality of'stops on the mounting cooperating with said spring for normally holding both wiper-carriers at adistnce from the pane surfaces, handlemembers fastened respectively to the sleeve and axle` and a longitudinal slot in the sleeve for permitting relative displacement of said members and wiper-carriers associated therewith.

In testimony, that I claim the foregoing as my invention, I have signed my name this 6th day of May 1924:.

HANS voN LITTROW.

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